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Is my puppy's sleepiness normal after vaccinations, or should I worry?

Updated On September 23rd, 2025

Very sleepy pup after shots on previous say

4 Answers

Most Helpful Answer

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Answered By Destini R. Holloway, DVM

Veterinarian

Published on July 30th, 2016

Puppy's getting sleepy after their shots is a normal reaction to vaccinations. They can also have a low grade fever and/or one bout of vomiting/diarrhea normally that are no cause for concern. The concern arises when your pet is severely lethargic, not eating, non-responsive, pale gums, or excessive vomiting/diarrhea. If you notice any of these symptoms then it is best to take puppy to a vet asap for immediate care, because a mores serious vaccine reaction is occurring at that point.

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11Pet Parents found this answer helpful

Other Answers

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    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on July 7th, 2018

    It is quite normal for a dog to feel tired and even have a bit of a fever after vaccinations, This is actually a sign that the immune system of the body kicked in and is reacting properly. However sometimes dogs can have an adverse reaction which would usually show by vomiting, shaking, severe lethargy, sometimes breathing problems, If these signs appear you need to take Gordo to a vet right away for an exam and antihistamine and/or steroid injection.

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    Answered By Makenzie Kurth, DVM

    Veterinarian

    Published on March 28th, 2019

    You are a completely normal, wonderful owner! If she is still eating, drinking, peeing, and pooping - I am good with this. Just like in people, it is common to feel sore, tired, and even a little feverish after vaccines. This almost always goes away within 24 hours. If she seems particularly sore or painful, call your vet first thing in the morning to ask if a single dose of anti-inflammatory pain medication might be appropriate. If at any time you see vomiting, diarrhea, collapse, hives, or facial swelling, head to the nearest emergency clinic immediately - these are signs of more severe allergic-type reactions (which are reported in <1% of patients by the way). Best wishes to you and Lola!

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    Answered By Dr. Davis

    Veterinarian

    Published on March 13th, 2018

    Yes, this can be normal, especially for puppies. She should be back to normal in a day or so. If she is still lethargic after that time or not eating or drinking then I’d take her in for an exam. The reactions usually are less as the animal mature. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for Caroline.

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